The other day I helped cleaning out an old storage at my mother's. I found this:

It is clean, but well-worn. The text is in Danish. Ice blocks still look about the same, but I think they were kind of "new" tech back then?

This one is probably from the mid-70s. We went several times with caravan on holiday, some times to Denmark. Including the first one. In those days, the camping sites usually did not have electricity to the parking spots, so you went to the camping store and turned in such iceblocks for frozen ones for a small fee, and put them in an insulated freezer box in the caravan. Furthermore, caravans had a car battery, so you sometimes had to charge them. Or maybe also exchange them for a fee (I do not remember, I was maybe 12 the first trip).

I think caravans became common in the 1970s. Before that families used tents. I think we used tent for short outings when I was a wee boy. In the mid-70s I had a friend, whose much older parents still had only a tent even on camping grounds, but that felt even back then as something quite rare. Old school, as they say now. Every family had a car long before they had caravans. If they had them.

My mother grew up on a farm. Sometimes roma ("gypsies") groups came. They had wagons and tents. Later they used cars and caravans, of course. By then they did not visit small villages, as far as I know.

My father once told me that in the (early?) fifties, there had been a big group of Americans visiting Sweden with caravans (the metallic ones). It was very exotic, and got a lot of attention. No one had seen such vehicles before in Sweden.

Segway:
After the war, Sweden oriented itself a lot towards the US.. My dad told me he bought a U.S. made "nylon" shirt when that was a very new thing. It cost him about a quarter (!) of a months salary, that was when he was a young bachelor. It was quite horrible to wear, almost like a woven plastic bag. The cost to be modern can be rather steep...